مؤسسة الشرق الأوسط للنشر العلمي
عادةً ما يتم الرد في غضون خمس دقائق
Abstract
In this paper, performance of amplified light wave systems employing both conventional M-aty Quadrature Amplitude Modulation Subcarriers Multiple Intensity Modulation / Direct Detection (M-ary QAM-SCM-IM/ DD) and OCDMA/DD schemes have been analyzed. The analysis also incorporates the influence of code rates (weights) on the system performance. It is observed front analysis that for a given number of users, performance of OCDMA networks improves with the increase in the code weight. Fourteener, use of large code weight will give rise to better performance, but a smaller number of simultaneous supportable users. On the other hand, use of small code weight leads to a poor performance, but in this case the number of supportable users is large. Also, it is found that coding can increase the total channel number and eliminate error floor under a given bit error rate and receiver sensitivity. These systems employ-ng optical amplifier have been studied and investigated. It is found that coding can increase the total channel number and eliminate error floor under a given hit error rate and receiver sensitivity. A performance comparison of QAM and OCDMA systems reveals that OCDMA can accommodate a larger number of subscribers and more simultaneous users than QAM